LIBS Info: Element Analysis

Title Authors Material Detector Spectrometer Software
Direct spectral analysis of tea samples using 266 nm UV pulsed laserinduced breakdown spectroscopy and cross validation of LIBS results with ICP-MS L.E. Oloore, Umair Baig, Yusuf B. Habibullah, M.A. Gondal Organic Andor iStar ICCD Andor Shamrock 500i
Laser: Nd:YAG
266.0000nm
17.5000mJ
20.000Hz
Gate Delay: 0.317us
Gate Width: Noneus
Pellets were made by compressing supermarket tea at high pressure. These were analysed, with comparison to ICP-MS analysis of liquid teas. The authors ensured the LIBS analysis was undertaken under conditions of Local Thermodynamic Equilibrium by measuring the plasma temperature (Boltzmann plot) and electron density (Stark Broadening). Similarly delay time was optimised for best S/N ratio. Note LOD in the paper quote 2 sigma/S. These have been converted to the more standard 3 sigma/S for display
Element Detection Limit (ppm) Wavelength (nm) Other Wavelengths (nm) Calibration Method Calibration Range (ppm) Notes
Ca 18.0000 (Calibration Curve Slope) 317.9000 N/A Univariate -10.0000--10.0000 Analysis of pellets made of tea.
Si 1.5000 (Calibration Curve Slope) 784.9000 N/A Univariate -10.0000--10.0000 Analysis of pellets made of tea.
Cu 9.0000 (Calibration Curve Slope) 777.9000 N/A Univariate -10.0000--10.0000 Analysis of pellets made of tea.
Br 16.5000 (Calibration Curve Slope) 793.9000 N/A Univariate -10.0000--10.0000 Analysis of pellets made of tea.
K 21.0000 (Calibration Curve Slope) 766.5000 N/A Univariate -10.0000--10.0000 Analysis of pellets made of tea.
Cr 18.0000 (Calibration Curve Slope) 286.5000 N/A Univariate -10.0000--10.0000 Analysis of pellets made of tea.
Fe 33.0000 (Calibration Curve Slope) 275.6000 N/A Univariate -10.0000--10.0000 Analysis of pellets made of tea.


Element RMSE (ppm) Wavelength (nm) Calibration Method Notes
Br 90.0999 ppm 793.9000 Univariate Calibration . . . . . .
Cu 3.0000 ppm 777.9000 Univariate Calibration . Analysis of pellets made of tea. . . . .
Fe 37.8968 ppm 275.6000 Univariate Calibration . Analysis of pellets made of tea. . . . .
Cr 11.2472 ppm -286.5000 Univariate Calibration . . . . . .
Ca 6.9041 ppm 317.9000 Univariate Calibration . . . . . .
K 310.3415 ppm 766.5000 Univariate Calibration . . . . . .
Si 1.5275 ppm 784.9000 Univariate Calibration . . . . . .